Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 7 : 8.
After Adam gives 20 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 2 : 3.
- Whose number of stickers has not changed? Give the answer in number. (Eg Adam = 1; Bryan = 2)
- Number of stickers that Bryan has = _____ u
- Change in the number of stickers that Adam has = _____ u
- 1 u = _____
|
Adam |
Bryan |
Before |
7 x 3 = 21 u |
8 x 3 = 24 u |
Change |
- 20 |
|
After |
2 x 8 = 16 u |
3 x 8 = 24 u |
(a)
Change ratio into units.
The number of stickers that Bryan (2) has remains unchanged.
(b)
LCM of 8 and 3 = 24
Number of stickers that Bryan has = 24 u
(c)
Change in the number of stickers that Adam has
= 21 u - 16 u
= 5 u
(d)
Number of stickers that Adam gives away = 20
5 u = 20
1 u = 20 ÷ 5 = 4
Answer(s): (a) 2; (b) 24; (c) 5; (d) 4